Some reviewersnoticed that the HD 4830 samples that they received from AMD were missing 80 of their 640 stream processors and now it appears that around 400 HIS branded cards with this problem have made it into the hands of customers. That article says that you can go to HIS website to find updated BIOS that can fix the problem, but I was not able to find them there. Do not despair folks, you can find those BIOS files right here from TechPowerUP!.